Nice work pal.. Keep it up. You also can use toothpick to paint the line or use Gundam marker GM01 black for lining as easier way..

Have you thought about using a very fine-point permanent marker for lines? It's so much easier and cleaner than painting.

Nice figure mate!! The white you've done turned out great...
And considering you painted the black lines free-hand, its neater
than what I could of done!! When your painting lines like that next
time try using electrical tape to mask out the line like on each side
of the line your painting, paint the line then peal off the tape when
its dry and you should have a neat line!! Works for me every time....
Nice work though mate.... -ged.

Thanks for the tip. Non-straight lines have been driving me nuts forever.

Cool!